original 20R-8058 Common Rail Injector 20R-8060 20R-8066 295-1408 387-9430 for C7 C9 320D 323D Truck new injector original new injector

The C7 fuel injector 20R-8058 is precision-engineered to OEM specifications for the C7 and C7 ACERT diesel engine platform. Utilizing the HEUI (Hydraulic Electronic Unit Injection) fuel system, the injector leverages engine oil pressure as an intensification medium to generate high injection pressure, ensuring accurate fuel metering and optimized spray atomization. This design supports improved combustion efficiency, reduced exhaust emissions, and maximum engine performance across demanding heavy-duty operating cycles. Internally, hardened heat-treated needle valves and control pistons deliver extended wear resistance, while corrosion-resistant protective coatings guard internal components against sulfur contamination and moisture intrusion. Precision multi-hole nozzle geometry produces uniform fuel distribution throughout the combustion cycle.

This injector is fully compatible with a wide range of machinery and equipment powered by the C7 and C7 ACERT engine family. It is widely applied in excavators such as the 320D, 321D, and 323D, wheel loaders including the 938H and 950H, motor graders like the 140M and 12M, backhoe loaders in the 420D to 442D range, and on-highway trucks from Freightliner, Kenworth, Peterbilt, International, and Sterling. It is also specified for industrial generator sets such as Olympian, Genset, and FG Wilson, making it a versatile solution for construction, mining, agriculture, marine auxiliary, and power generation applications worldwide.

Proper installation is essential to achieve the rated 10,000+ operating hour service life. The recommended procedure includes cleaning the injector bore, inspecting the cylinder head seat, installing a new copper washer, lubricating the O-rings, torquing the assembly to specifications, reconnecting the wiring harness, priming the fuel system, and performing an injector cutout test to verify no leakage. HEUI technology further delivers higher power density, better cold-start capability, reduced smoke, improved fuel economy, and lower NOx emissions, ensuring long-term reliability in heavy-duty industrial environments.